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0b682800bc
On Apple Silicon, when Hardened Runtime is in force and the application lacks the "Allow Unsigned Executable Memory Entitlement", mmap and mprotect return EACCES when an attempt is made to create or modify memory so that it is simultaneously writable and executable. This commit handles these cases by retrying the operation without the PROT_EXEC flag, and setting global variables so that future operations omit the flag.
756 lines
22 KiB
C
756 lines
22 KiB
C
/* config.h: MPS CONFIGURATION
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*
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* $Id$
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* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
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* Portions copyright (c) 2002 Global Graphics Software.
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*
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* PURPOSE
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*
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* This module translates from high-level symbols defined by the
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* external build system (gnumake, nmake, etc.) into specific sets
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* of features used by MPS modules.
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*
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* DESIGN
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*
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* <design/config>.
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*/
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#ifndef config_h
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#define config_h
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/* CONFIG_VAR_* -- variety Configuration
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*
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* These are translated into the directives CONFIG_ASSERT, CONFIG_STATS,
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* CONFIG_LOG, etc. which control actual compilation features.
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*/
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/* CONFIG_VAR_RASH -- the rash and reckless variety
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*
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* This variety switches off as many features as possible for maximum
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* performance, but is therefore unsafe and undebuggable. It is not intended
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* for use, but for comparison with the hot variety, to check that assertion,
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* logging, etc. have negligible overhead.
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*/
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#if defined(CONFIG_VAR_RASH)
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/* no asserts */
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/* no statistic meters */
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/* no telemetry log events */
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/* CONFIG_VAR_COOL -- cool variety
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*
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* The cool variety is intended for use when developing an integration with
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* the MPS or debugging memory problems or collecting detailed telemetry
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* data for performance analysis. It has more thorough consistency checking
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* and data collection and output, and full debugging information.
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*/
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#elif defined(CONFIG_VAR_COOL)
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#define CONFIG_ASSERT
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#define CONFIG_ASSERT_ALL
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#define CONFIG_ASSERT_ABORT
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#define CONFIG_STATS
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#ifndef CHECKLEVEL
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#define CHECKLEVEL CheckLevelSHALLOW
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#endif
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#define CONFIG_LOG
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#define CONFIG_LOG_ALL
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#else /* CONFIG_VAR_* */
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/* CONFIG_VAR_HOT -- the hot variety
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*
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* This variety is the default variety for distribution in products that use
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* the MPS. It has maximum performance while retaining a good level of
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* consistency checking and allowing some debugging and telemetry features.
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*/
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/* #elif defined(CONFIG_VAR_HOT) */
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#define CONFIG_ASSERT
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/* Note, not CONFIG_ASSERT_ABORT */
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#ifndef CHECKLEVEL
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#define CHECKLEVEL CheckLevelMINIMAL
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#endif
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/* no statistic meters */
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#define CONFIG_LOG
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#endif /* CONFIG_VAR_* */
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/* Build Features */
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#if defined(CONFIG_ASSERT)
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/* asserts: AVER, AVERT, NOTREACHED, CHECKx */
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/* note: a direct call to ASSERT() will *still* fire */
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#define AVER_AND_CHECK
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#if defined(CONFIG_ASSERT_ALL)
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#define AVER_AND_CHECK_ALL
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#define MPS_ASSERT_STRING "assertastic"
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#else /* CONFIG_ASSERT_ALL, not */
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#define MPS_ASSERT_STRING "asserted"
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#endif /* CONFIG_ASSERT_ALL */
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#else /* CONFIG_ASSERT, not */
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#define AVER_AND_CHECK_NONE
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#define MPS_ASSERT_STRING "nonasserted"
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#endif
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#if defined(CONFIG_ASSERT_ABORT)
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#define ASSERT_ABORT() abort()
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#else
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#define ASSERT_ABORT() NOOP
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#endif
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#if defined(CONFIG_STATS)
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/* CONFIG_STATS = STATISTICS = METERs */
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#define STATISTICS
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#define MPS_STATS_STRING "stats"
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#else
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#define STATISTICS_NONE
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#define MPS_STATS_STRING "nonstats"
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#endif
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#if defined(CONFIG_LOG)
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/* TELEMETRY = LOG = EVENTs */
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#define EVENT
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#if defined(CONFIG_LOG_ALL)
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#define EVENT_ALL 1 /* log events on critical path */
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#define MPS_LOG_STRING "logtastic"
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#else /* CONFIG_LOG_ALL, not */
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#define EVENT_ALL 0 /* don't log events on critical path */
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#define MPS_LOG_STRING "logging"
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#endif /* CONFIG_LOG_ALL */
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#else /* CONFIG_LOG, not */
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#define EVENT_NONE
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#define MPS_LOG_STRING "nonlogging"
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#endif /* CONFIG_LOG */
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/* CONFIG_PLINTH_NONE -- exclude the ANSI plinth
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*
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* Some MPS deployment environments want to avoid dependencies on the
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* standard C library. In this case, the plinth, defined in mpslib.h must
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* be supplied when linking.
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*
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* For example, Open Dylan on Windows does not link the C library, but
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* supplies its own plinth directly using Windows and Dylan interfaces.
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*
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* CONFIG_PLINTH_NONE tells mps.c to exclude the ANSI plinth and removes
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* all standard C library dependencies. e.g.
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*
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* cc -O2 -c -DCONFIG_PLINTH_NONE mps.c
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*/
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#if !defined(CONFIG_PLINTH_NONE)
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#define PLINTH
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#else
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#define PLINTH_NONE
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#endif
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/* CONFIG_PF_ANSI -- use the ANSI platform
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*
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* This symbol tells mps.c to exclude the sources for the
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* auto-detected platform, and use the generic ("ANSI") platform
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* instead.
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*/
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#if defined(CONFIG_PF_ANSI)
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#define PLATFORM_ANSI
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#endif
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/* CONFIG_THREAD_SINGLE -- support single-threaded execution only
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*
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* This symbol causes the MPS to be built for single-threaded
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* execution only, where locks are not needed and so the generic
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* ("ANSI") lock module lockan.c can be used instead of the
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* platform-specific lock module.
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*/
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#if !defined(CONFIG_THREAD_SINGLE)
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#define LOCK
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#else
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#define LOCK_NONE
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#endif
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/* CONFIG_POLL_NONE -- no support for polling
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*
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* This symbol causes the MPS to built without support for polling.
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* This means that garbage collections will only happen if requested
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* explicitly via mps_arena_collect() or mps_arena_step(), but it also
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* means that protection is not needed, and so shield operations can
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* be replaced with no-ops in mpm.h.
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*/
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#if !defined(CONFIG_POLL_NONE)
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#define REMEMBERED_SET
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#define SHIELD
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#else
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#if !defined(CONFIG_THREAD_SINGLE)
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#error "CONFIG_POLL_NONE without CONFIG_THREAD_SINGLE"
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#endif
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#define REMEMBERED_SET_NONE
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#define SHIELD_NONE
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#endif
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#define MPS_VARIETY_STRING \
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MPS_ASSERT_STRING "." MPS_LOG_STRING "." MPS_STATS_STRING
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/* Platform Configuration */
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#include "mpstd.h"
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/* Suppress Visual C warnings at /W4 (warning level 4) */
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/* This is also done in testlib.h. */
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#ifdef MPS_BUILD_MV
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/* "constant conditional" (provoked by MPS_END) */
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#pragma warning(disable: 4127)
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#endif /* MPS_BUILD_MV */
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/* Suppress Pelles C warnings at /W2 (warning level 2) */
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/* Some of the same settings are done in testlib.h. */
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#ifdef MPS_BUILD_PC
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/* "Unreachable code" (provoked by AVER, if condition is constantly true). */
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#pragma warn(disable: 2154)
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/* "Consider changing type to 'size_t' for loop variable" */
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#pragma warn(disable: 2804)
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#endif /* MPS_BUILD_PC */
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/* MPS_FILE -- expands to __FILE__ in nested macros */
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#ifdef MPS_BUILD_PC
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/* Pelles C loses definition of __FILE__ in deeply nested macro
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* expansions. See <https://forum.pellesc.de/index.php?topic=5474.0>
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*/
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#define MPS_FILE "<__FILE__ unavailable in " MPS_PF_STRING ">"
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#else
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#define MPS_FILE __FILE__
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#endif
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/* Function attributes */
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/* Some of these are also defined in testlib.h */
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/* Attribute for functions that take a printf-like format argument, so
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* that the compiler can check the format specifiers against the types
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* of the arguments.
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* GCC: <https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-format-function-attribute>
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* Clang: <https://clang.llvm.org/docs/AttributeReference.html#format-gnu-format>
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*/
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#if defined(MPS_BUILD_GC) || defined(MPS_BUILD_LL)
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#define ATTRIBUTE_FORMAT(ARGLIST) __attribute__((__format__ ARGLIST))
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#else
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#define ATTRIBUTE_FORMAT(ARGLIST)
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#endif
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/* Attribute for functions that should not be instrumented by Clang's
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* address sanitizer.
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* <https://clang.llvm.org/docs/AddressSanitizer.html#attribute-no-sanitize-address>
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*/
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#if defined(MPS_BUILD_LL)
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#if __has_feature(address_sanitizer)
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#define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((__no_sanitize_address__))
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#else
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#define ATTRIBUTE_NO_SANITIZE_ADDRESS
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#endif
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#else
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#define ATTRIBUTE_NO_SANITIZE_ADDRESS
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#endif
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/* Attribute for functions that must not be inlined.
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* GCC: <https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute>
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* MSVC: <https://docs.microsoft.com/en-us/cpp/cpp/noinline>
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*/
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#if defined(MPS_BUILD_GC) || defined(MPS_BUILD_LL)
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#define ATTRIBUTE_NOINLINE __attribute__((__noinline__))
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#elif defined(MPS_BUILD_MV)
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#define ATTRIBUTE_NOINLINE __declspec(noinline)
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#else
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#define ATTRIBUTE_NOINLINE
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#endif
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/* Attribute for functions that do not return.
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* GCC: <https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noreturn-function-attribute>
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* Clang: <https://clang.llvm.org/docs/AttributeReference.html#id1>
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*/
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#if defined(MPS_BUILD_GC) || defined(MPS_BUILD_LL)
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#define ATTRIBUTE_NORETURN __attribute__((__noreturn__))
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#else
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#define ATTRIBUTE_NORETURN
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#endif
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/* Attribute for functions that may be unused in some build configurations.
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* GCC: <https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-unused-function-attribute>
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*
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* This attribute must be applied to all Check functions, otherwise
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* the RASH variety fails to compile with -Wunused-function. (It
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* should not be applied to functions that are unused in all build
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* configurations: these functions should not be compiled.)
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*/
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#if defined(MPS_BUILD_GC) || defined(MPS_BUILD_LL)
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#define ATTRIBUTE_UNUSED __attribute__((__unused__))
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#else
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#define ATTRIBUTE_UNUSED
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#endif
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/* Compiler extensions */
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/* LIKELY -- likely conditions
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*
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* Use to annotate conditions that are likely to be true, such as
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* assertions, to help move unlikely code out-of-line. See
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* <https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html>.
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*/
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#if defined(MPS_BUILD_GC) || defined(MPS_BUILD_LL)
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#define LIKELY(exp) __builtin_expect((exp) != 0, 1)
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#else
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#define LIKELY(exp) ((exp) != 0)
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#endif
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/* Buffer Configuration -- see <code/buffer.c> */
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#define BUFFER_RANK_DEFAULT (mps_rank_exact())
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/* Format defaults: see <code/format.c> */
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#define FMT_ALIGN_DEFAULT ((Align)MPS_PF_ALIGN)
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#define FMT_HEADER_SIZE_DEFAULT ((Size)0)
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#define FMT_SCAN_DEFAULT (&FormatNoScan)
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#define FMT_SKIP_DEFAULT (&FormatNoSkip)
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#define FMT_FWD_DEFAULT (&FormatNoMove)
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#define FMT_ISFWD_DEFAULT (&FormatNoIsMoved)
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#define FMT_PAD_DEFAULT (&FormatNoPad)
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#define FMT_CLASS_DEFAULT (&FormatDefaultClass)
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/* Pool AMC Configuration -- see <code/poolamc.c> */
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#define AMC_INTERIOR_DEFAULT TRUE
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/* AMC treats objects larger than or equal to this as "Large" */
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#define AMC_LARGE_SIZE_DEFAULT ((Size)32768)
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#define AMC_EXTEND_BY_DEFAULT ((Size)8192)
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/* Pool AMS Configuration -- see <code/poolams.c> */
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#define AMS_SUPPORT_AMBIGUOUS_DEFAULT TRUE
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#define AMS_GEN_DEFAULT 0
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/* Pool AWL Configuration -- see <code/poolawl.c> */
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#define AWL_GEN_DEFAULT 0
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#define AWL_HAVE_SEG_SA_LIMIT TRUE
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#define AWL_SEG_SA_LIMIT 200 /* TODO: Improve guesswork with measurements */
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#define AWL_HAVE_TOTAL_SA_LIMIT FALSE
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#define AWL_TOTAL_SA_LIMIT 0
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/* Pool LO Configuration -- see <code/poollo.c> */
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#define LO_GEN_DEFAULT 0
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/* Pool MFS Configuration -- see <code/poolmfs.c> */
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#define MFS_EXTEND_BY_DEFAULT ((Size)65536)
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/* Pool MVFF Configuration -- see <code/poolmvff.c> */
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#define MVFF_EXTEND_BY_DEFAULT ((Size)65536)
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#define MVFF_AVG_SIZE_DEFAULT ((Size)32)
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#define MVFF_ALIGN_DEFAULT MPS_PF_ALIGN
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#define MVFF_SLOT_HIGH_DEFAULT FALSE
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#define MVFF_ARENA_HIGH_DEFAULT FALSE
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#define MVFF_FIRST_FIT_DEFAULT TRUE
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#define MVFF_SPARE_DEFAULT 0.75
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/* Pool MVT Configuration -- see <code/poolmv2.c> */
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/* FIXME: These numbers were lifted from mv2test and need thought. */
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#define MVT_ALIGN_DEFAULT MPS_PF_ALIGN
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#define MVT_MIN_SIZE_DEFAULT MPS_PF_ALIGN
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#define MVT_MEAN_SIZE_DEFAULT 32
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#define MVT_MAX_SIZE_DEFAULT 8192
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#define MVT_RESERVE_DEPTH_DEFAULT 1024
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#define MVT_FRAG_LIMIT_DEFAULT 30
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/* Arena Configuration -- see <code/arena.c> */
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#define ArenaPollALLOCTIME (65536.0)
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/* .client.seg-size: ARENA_CLIENT_GRAIN_SIZE is the minimum size, in
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* bytes, of a grain in the client arena. It's set at 8192 with no
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* particular justification. */
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#define ARENA_CLIENT_GRAIN_SIZE ((Size)8192)
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#define ARENA_DEFAULT_COMMIT_LIMIT ((Size)-1)
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#define ARENA_SPARE_DEFAULT 0.75
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/* ARENA_DEFAULT_PAUSE_TIME is the maximum time (in seconds) that
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* operations within the arena may pause the mutator for. The default
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* is set for typical human interaction. See mps_arena_pause_time_set
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* in the manual. */
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#define ARENA_DEFAULT_PAUSE_TIME (0.1)
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#define ARENA_DEFAULT_ZONED TRUE
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/* ARENA_MINIMUM_COLLECTABLE_SIZE is the minimum size (in bytes) of
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* collectable memory that might be considered worthwhile to run a
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* full garbage collection. */
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#define ARENA_MINIMUM_COLLECTABLE_SIZE ((Size)1000000)
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/* ARENA_DEFAULT_COLLECTION_RATE is an estimate of the MPS's
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* collection rate (in work per second; see <design/type#.work>), for
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* use in the case where there isn't enough data to use a measured
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* value. */
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#define ARENA_DEFAULT_COLLECTION_RATE (25000000.0)
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/* ARENA_DEFAULT_COLLECTION_OVERHEAD is an estimate of the MPS's
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* collection overhead (in seconds), for use in the case where there
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* isn't enough data to use a measured value. */
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#define ARENA_DEFAULT_COLLECTION_OVERHEAD (0.1)
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/* ARENA_MAX_COLLECT_FRACTION is the maximum fraction of runtime that
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* ArenaStep is prepared to spend in collections. */
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#define ARENA_MAX_COLLECT_FRACTION (0.1)
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/* ArenaDefaultZONESET is the zone set used by LocusPrefDEFAULT.
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*
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* TODO: This is left over from before branches 2014-01-29/mps-chain-zones
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* and 2014-01-17/cbs-tract-alloc reformed allocation, and may now be
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* doing more harm than good. Experiment with setting to ZoneSetUNIV. */
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#define ArenaDefaultZONESET (ZoneSetUNIV << (MPS_WORD_WIDTH / 2))
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/* LocusPrefDEFAULT is the allocation preference used by manual pool
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* classes (these don't care where they allocate). */
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#define LocusPrefDEFAULT { \
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LocusPrefSig, /* sig */ \
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FALSE, /* high */ \
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ArenaDefaultZONESET, /* zoneSet */ \
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ZoneSetEMPTY, /* avoid */ \
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}
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#define LDHistoryLENGTH ((Size)4)
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/* Value of MPS_KEY_EXTEND_BY for the arena control pool. */
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#define CONTROL_EXTEND_BY ((Size)32768)
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#define VM_ARENA_SIZE_DEFAULT ((Size)1 << 28)
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/* Locus configuration -- see <code/locus.c> */
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/* Weighting for the current observation, in the exponential moving
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* average computation of the mortality of a generation. */
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#define LocusMortalityALPHA (0.4)
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/* Stack probe configuration -- see <code/sp*.c> */
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/* Currently StackProbe has a useful implementation only on Windows. */
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#if defined(MPS_OS_W3) && !defined(CONFIG_PF_ANSI)
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/* See <design/sp#.sol.depth.analysis> for a justification of this value. */
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#define StackProbeDEPTH ((Size)500)
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#else
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#define StackProbeDEPTH ((Size)0)
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#endif
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/* Shield Configuration -- see <code/shield.c> */
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#define ShieldQueueLENGTH 512 /* initial length of shield queue */
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#define ShieldDepthWIDTH 4 /* log2(max nested exposes + 1) */
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/* VM Configuration -- see <code/vm*.c> */
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#define VMAN_PAGE_SIZE ((Align)4096)
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#define VMJunkBYTE ((unsigned char)0xA9)
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#define VMParamSize (sizeof(Word))
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/* .feature.li: Linux feature specification
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*
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* The MPS needs the following symbols which are not defined if the
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* -ansi option is given to GCC:
|
|
*
|
|
* Source Symbols Header Feature
|
|
* =========== ========================= ============= ====================
|
|
* eventtxt.c setenv <stdlib.h> _GNU_SOURCE
|
|
* lockix.c pthread_mutexattr_settype <pthread.h> _XOPEN_SOURCE >= 500
|
|
* prmcix.h stack_t, siginfo_t <signal.h> _XOPEN_SOURCE
|
|
* prmclii3.c REG_EAX etc. <ucontext.h> _GNU_SOURCE
|
|
* prmclii6.c REG_RAX etc. <ucontext.h> _GNU_SOURCE
|
|
* pthrdext.c sigaction etc. <signal.h> _XOPEN_SOURCE
|
|
* vmix.c MAP_ANON <sys/mman.h> _GNU_SOURCE
|
|
*
|
|
* It is not possible to localize these feature specifications around
|
|
* the individual headers: all headers share a common set of features
|
|
* (via <feature.h>) and so all sources in the same compilation unit
|
|
* must turn on the same set of features.
|
|
*
|
|
* See "Feature Test Macros" in the Glibc Manual:
|
|
* <https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html>
|
|
*/
|
|
|
|
#if defined(MPS_OS_LI)
|
|
|
|
#if defined(_XOPEN_SOURCE) && _XOPEN_SOURCE < 500
|
|
#undef _XOPEN_SOURCE
|
|
#endif
|
|
#if !defined(_XOPEN_SOURCE)
|
|
#define _XOPEN_SOURCE 500
|
|
#endif
|
|
|
|
#if !defined(_GNU_SOURCE)
|
|
#define _GNU_SOURCE
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|
|
/* .feature.xc: macOS feature specification
|
|
*
|
|
* The MPS needs the following symbols which are not defined by default
|
|
*
|
|
* Source Symbols Header Feature
|
|
* =========== ========================= ============= ====================
|
|
* prmclii3.c __eax etc. <ucontext.h> _XOPEN_SOURCE
|
|
* prmclii6.c __rax etc. <ucontext.h> _XOPEN_SOURCE
|
|
*
|
|
* It is not possible to localize these feature specifications around
|
|
* the individual headers: all headers share a common set of features
|
|
* (via <sys/cdefs.h>) and so all sources in the same compilation unit
|
|
* must turn on the same set of features.
|
|
*/
|
|
|
|
#if defined(MPS_OS_XC)
|
|
|
|
#if !defined(_XOPEN_SOURCE)
|
|
#define _XOPEN_SOURCE
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|
|
/* Almost all of protxc.c etc. are architecture-independent, but unfortunately
|
|
the Mach headers don't provide architecture neutral symbols for simple
|
|
things like thread states. These definitions fix that. */
|
|
|
|
#if defined(MPS_OS_XC)
|
|
#if defined(MPS_ARCH_A6)
|
|
|
|
#define THREAD_STATE_COUNT ARM_THREAD_STATE64_COUNT
|
|
#define THREAD_STATE_FLAVOR ARM_THREAD_STATE64
|
|
#define THREAD_STATE_S arm_thread_state64_t
|
|
|
|
#elif defined(MPS_ARCH_I6)
|
|
|
|
#define THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT
|
|
#define THREAD_STATE_FLAVOR x86_THREAD_STATE64
|
|
#define THREAD_STATE_S x86_thread_state64_t
|
|
|
|
#elif defined(MPS_ARCH_I3)
|
|
|
|
#define THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT
|
|
#define THREAD_STATE_FLAVOR x86_THREAD_STATE32
|
|
#define THREAD_STATE_S x86_thread_state32_t
|
|
|
|
#else
|
|
|
|
#error "Unknown macOS architecture"
|
|
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/* POSIX thread extensions configuration -- see <code/pthrdext.c> */
|
|
|
|
#if defined(MPS_OS_LI) || defined(MPS_OS_FR)
|
|
|
|
/* PTHREADEXT_SIGSUSPEND -- signal used to suspend a thread
|
|
* <design/pthreadext#.impl.signals>
|
|
*/
|
|
#if defined(CONFIG_PTHREADEXT_SIGSUSPEND)
|
|
#define PTHREADEXT_SIGSUSPEND CONFIG_PTHREADEXT_SIGSUSPEND
|
|
#else
|
|
#define PTHREADEXT_SIGSUSPEND SIGXFSZ
|
|
#endif
|
|
|
|
/* PTHREADEXT_SIGRESUME -- signal used to resume a thread
|
|
* <design/pthreadext#.impl.signals>
|
|
*/
|
|
#if defined(CONFIG_PTHREADEXT_SIGRESUME)
|
|
#define PTHREADEXT_SIGRESUME CONFIG_PTHREADEXT_SIGRESUME
|
|
#else
|
|
#define PTHREADEXT_SIGRESUME SIGXCPU
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|
|
/* Tracer Configuration -- see <code/trace.c> */
|
|
|
|
#define TraceLIMIT ((size_t)1)
|
|
/* I count 4 function calls to scan, 10 to copy. */
|
|
#define TraceCopyScanRATIO (1.5)
|
|
|
|
|
|
/* Events
|
|
*
|
|
* EventBufferSIZE is the number of words in the global event buffer.
|
|
*/
|
|
|
|
#define EventBufferSIZE ((size_t)4096)
|
|
#define EventStringLengthMAX ((size_t)255) /* Not including NUL */
|
|
|
|
|
|
/* Assert Buffer */
|
|
|
|
#define ASSERT_BUFFER_SIZE ((Size)512)
|
|
|
|
|
|
/* memory operator configuration
|
|
*
|
|
* We need efficient operators similar to memcpy, memset, and memcmp.
|
|
* In general, we cannot use the C library mem functions directly as
|
|
* that would not be freestanding. However, on some platforms we can do
|
|
* this, because they are inlined by the compiler and so do not actually
|
|
* create a dependence on an external library.
|
|
*/
|
|
|
|
#if defined(MPS_PF_W3I3MV)
|
|
/* MSVC on Intel inlines mem* when optimizing */
|
|
#define mps_lib_memset(p, c, l) memset(p, c, l)
|
|
#define mps_lib_memcpy(p, q, s) memcpy(p, q, s)
|
|
#define mps_lib_memcmp(p, q, s) memcmp(p, q, s)
|
|
/* get prototypes for ANSI mem* */
|
|
#include <string.h>
|
|
#endif
|
|
|
|
|
|
/* Product Configuration
|
|
*
|
|
* Deprecated, see design/config/#req.prod>. This now only contains the
|
|
* configuration used by the former "MPS" product, which is now the only
|
|
* product.
|
|
*/
|
|
|
|
#define MPS_PROD_STRING "mps"
|
|
#define MPS_PROD_MPS
|
|
|
|
|
|
/* Default chain for GC pools
|
|
*
|
|
* TODO: The default should be to measure liveness and make sensible
|
|
* decisions. See job003794.
|
|
*/
|
|
|
|
#define ChainDEFAULT \
|
|
{ \
|
|
{ 8 * 1024, 0.85 }, /* nursery */ \
|
|
{ 36 * 1024, 0.45 } /* second gen, after which dynamic */ \
|
|
}
|
|
|
|
|
|
/* Write barrier deferral
|
|
*
|
|
* <design/write-barrier#.deferral>.
|
|
*
|
|
* TODO: These settings were determined by trial and error, but should
|
|
* be based on measurement of the protection overhead on each
|
|
* platform. We know it's extremely different between macOS and
|
|
* Windows, for example. <design/write-barrier#.improv.by-os>.
|
|
*
|
|
* TODO: Consider basing the count on the amount of time that has
|
|
* passed in the mutator rather than the number of scans.
|
|
*/
|
|
|
|
#define WB_DEFER_BITS 2 /* bitfield width for deferral count */
|
|
#define WB_DEFER_INIT 3 /* boring scans after new segment */
|
|
#define WB_DEFER_DELAY 3 /* boring scans after interesting scan */
|
|
#define WB_DEFER_HIT 1 /* boring scans after barrier hit */
|
|
|
|
|
|
/* Apple Hardened Runtime
|
|
*
|
|
* The MAYBE_HARDENED_RUNTIME macro is true if Apple's "Hardened
|
|
* Runtime" feature may be enabled, and so calls to mmap() and
|
|
* mprotect() with PROT_WRITE | PROT_EXEC may fail with EACCES.
|
|
* See <design/prot#impl.xc.prot.exec> for details.
|
|
*/
|
|
#if defined(MPS_OS_XC) && defined(MPS_ARCH_A6)
|
|
#define MAYBE_HARDENED_RUNTIME 1
|
|
#else
|
|
#define MAYBE_HARDENED_RUNTIME 0
|
|
#endif
|
|
|
|
#endif /* config_h */
|
|
|
|
|
|
/* C. COPYRIGHT AND LICENSE
|
|
*
|
|
* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|